3427 results about "Fuel supply" patented technology

The invention relates to a fuel cell test system integrated with an electrochemical alternating current impedance test function, which comprises a fuel cell stack, an air supply unit, a fuel supply unit, a cooling supply unit, a control unit, an acquisition and driving unit and an electrochemical impedance measurement system, the output ends of the air supply unit, the fuel supply unit and the cooling supply unit are connected with the fuel cell stack, the acquisition and driving unit is connected with the fuel supply unit, the control unit is connected with the acquisition and driving unit, and the electrochemical impedance measurement system is connected with the fuel cell stack and the control unit. By adopting the fuel cell test system, method and device integrated with the electrochemical alternating-current impedance test function, the processor and the computer readable storage medium, rapid measurement and impedance calculation of electrochemical impedance in a fuel cell stack test process are realized, the integration level is high, the cost is greatly reduced, the operation is simple, and the test efficiency is high. Errors caused by repeated setting of load parameters are avoided, the measurement efficiency is high, and the measurement precision is high.

A fuel injector in a fuel system having a first fuel supply of a first fuel and a second fuel supply of a second fuel includes a multifunctional control valve movable in the fuel injector to control admission of the first fuel to a combined-fuel outlet passage, and to control a timing and an injection pressure of a fuel charge containing the first fuel. In an embodiment the first fuel includes a compression-ignition fuel such as diesel and the second fuel includes an alcohol fuel such as methanol. Related apparatus and methodology is disclosed.

A gearbox assembly includes a gearbox and a gutter for collecting a gearbox lubricant scavenge flow from the gearbox. The gutter is characterized by a lubricant extraction volume ratio between 0.01 and 0.3, and given byVGVG⁢B.VG is a gutter volume of the gutter and VGB is a gearbox volume. A gas turbine engine includes a combustion section and the gearbox assembly. A fuel delivery system includes a fuel supply line for delivering fuel to the combustion section. A lubrication system includes a lubricant supply line for delivering lubricant to the gearbox assembly. A thermal management system includes a fuel-lubricant heat exchanger for cooling the lubricant with the fuel. The thermal management system selectively directs the fuel through fuel bypass lines or the lubricant through lubricant bypass lines to bypass the fuel-lubricant heat exchanger based on a fuel temperature or a lubricant temperature.

The invention relates to the technical field of ship fuel supply system control, and discloses a double-lug C-type LNG fuel cabin and methanol fuel self-adaptive switching control system which comprises a fuel state sensing module, a switching logic decision module, an execution mechanism control module, a safety redundancy guarantee module and a state feedback recording module. The fuel state sensing module is used for collecting and normalizing fuel parameters and mechanism operation state data; the switching logic decision module constructs a model to simulate switching dynamic characteristics and mechanism response characteristics, and performs parameter adaptation; the execution mechanism control module constructs an algorithm to calculate a switching pressure threshold value, a flow matching value and a valve group action time sequence; the safety redundancy guarantee module evaluates the switching safety; and the state feedback recording module performs secondary evaluation in combination with the environment working condition when the risk exists. According to the system, self-adaptive switching of LNG and methanol fuel is achieved, and switching accuracy, system stability and safety are improved.

A propulsion system including: a fuel cell assembly having a fuel cell defining an outlet positioned to remove output products from the fuel cell and a fuel cell assembly operating condition; a turbomachine comprising a compressor section, a combustion section, and a turbine section arranged in serial flow order, the combustion section configured to receive a flow of aviation fuel from an aircraft fuel supply and further configured to receive the output products from the fuel cell; and a controller comprising memory and one or more processors, the memory storing instructions that when executed by the one or more processors cause the propulsion system to perform operations including receiving data indicative of a mid-flight flameout within the combustion section; modifying the fuel cell assembly operating condition in response to receiving data indicative of the mid-flight flameout within the combustion section; and initiating a relight of the combustion section.

The invention discloses a ship response system based on AI large model data fusion, and belongs to the technical field of ships, and the system comprises a dual-mode positioning module which is used for carrying out the centimeter-level positioning of a ship in a target sea area according to a GNSS system and an INS system, and obtaining the centimeter-level positioning ship position data; the data synchronization module is used for acquiring and synchronizing ship multi-source data according to the centimeter-level positioned ship position data to obtain ship situation data; and the edge-cloud collaboration module is used for monitoring the ship in real time according to the ship situation data and an edge-shore-based collaboration mechanism and dynamically adjusting the navigational speed and the fuel supply plan to stop the ship according to the sea condition. The problems that in the prior art, comprehensive and accurate comprehensive information is difficult to form, hidden dangers cannot be found in time, and accidents cannot be prevented in advance are solved.

The invention relates to the technical field of boiler control, and discloses a gas-fired boiler starting control method and system. The method comprises the following steps: acquiring initial operation parameters such as hearth pressure, water inlet temperature, flue gas oxygen content and fuel valve opening of the gas-fired boiler, establishing a thermodynamic state model in a starting stage according to the initial operation parameters, and dividing dynamic response thresholds of different load intervals; and calculating a theoretical fuel supply rate of the combustor based on the model, generating and dynamically updating a fuel supply correction coefficient in combination with a threshold value, synchronously marking key nodes according to abnormal distribution of hearth temperature, and adjusting a spatial air distribution strategy of the combustor. And after the correction coefficient is subjected to multi-stage buffer smoothing, a fuel control instruction is output to an executing mechanism. And switching to steady state control after the boiler reaches the preset load. The method adapts to the characteristics of a power plant unit, so that the starting process is more stable, the damage to a heated surface and pollutant emission are reduced, and rapid grid connection is assisted.

The invention provides an intelligent coal fuel scheduling dynamic early warning system and method, and belongs to the technical field of resource scheduling and logistics management, and the system comprises a data acquisition module which carries out the real-time monitoring of each node in a coal fuel supply chain through a preset multi-sensor network, and obtains the dynamic change data in the coal fuel supply chain; the historical analysis module is used for acquiring and analyzing historical scheduling data of the coal fuel supply chain; the scheme acquisition module is used for constructing a multi-level scheduling model and performing local scheduling at different levels in combination with an analysis result based on historical scheduling data and dynamic change data of a supply chain to generate an overall scheduling scheme and an overall alternative scheduling scheme; the scheme reconstruction module is used for executing coal fuel scheduling based on the overall scheduling scheme and obtaining real-time scheduling data to reconstruct the overall scheduling scheme; and the dispatching early warning module is used for constructing a multi-level early warning mechanism based on the coal fuel real-time dispatching data and carrying out early warning, so that the dispatching efficiency and the supply chain stability are improved.

A system for conditioning fuel configured to supply a main turbomachine, based on fuel from a cryogenic tank, comprising a pump configured to operate at a predetermined constant speed, at least one heat exchanger, a supply member for supplying the main turbomachine with a fuel flow, the supply member being configured to deliver a nominal flow rate when the pump is operating at a predetermined constant speed, at least one buffer tank, a first valve for controlling the supply of fuel to the buffer tank, a second valve for controlling the distribution of the fuel flew flow and a regulating device that is configured to open the second valve when the setpoint flow rate is higher than the nominal flow rate.

The invention provides a hot water boiler intelligent control system and method based on thermal load prediction, and relates to the field of intelligent control. Boiler operation state data collected by a sensor matrix is used as a main variable and external environment information is used as a covariable by using a data analysis and processing mode based on artificial intelligence; respectively extracting thermal load main variable time sequence coding characteristics and thermal load covariable time sequence coding characteristics from the main variable and the covariable; based on dynamic memory interaction representation between thermal load main variable time sequence coding characteristics and thermal load covariable time sequence coding characteristics, thermal load demand intelligent estimation is realized, and boiler fuel supply quantity is adjusted in real time according to the thermal load demand intelligent estimation. In this way, the change of the external environment can be responded in real time, and the efficient operation state can be kept in the complex and changeable environment.

A pre-ignition prevention system for a turbulent jet ignition (TJI) engine having dual spark plugs includes an ion sensing system and a controller configured to receive the ion sense signal from the ion sensing system, detect, using the ion sense signal, a misfire event where a firing of a first spark plug fails to completely combust a fuel / air pre-charge in a pre-chamber of a cylinder of the TJI engine, in response to detecting the misfire event, detect, using the ion sense signal, an exhaust stroke heat release event after a firing of the second spark plug indicative of a remaining portion of a primary fuel / air charge in the main chamber and, in response to detecting the exhaust stroke heat release event, adjust fueling for at least one subsequent combustion cycle to prevent pre-ignition of the remaining portion of the primary fuel / air charge in the main chamber.

The invention discloses a high-pressure main engine LNG fuel supply system, and relates to the technical field of LNG fuel high-pressure main engines, the high-pressure main engine LNG fuel supply system comprises a pressurization unit, an evaporation unit and a conveying unit, a fuel inlet of a high-pressure evaporator of the evaporation unit is connected with a high-pressure liquid supply pipe, and a fuel gas outlet of the high-pressure evaporator is connected with a high-pressure gas outlet pipe; a heating medium inlet of the high-pressure evaporator is connected with a steam pipeline, a heating medium outlet of the high-pressure evaporator is connected with a condensate water pipeline, and the condensate water pipeline is emptied. The steam pipeline is connected with the heating medium inlet of the high-pressure evaporator, and the heating medium outlet of the high-pressure evaporator is connected with the condensate water pipeline, so that steam is directly introduced into the high-pressure evaporator, a steam direct heating mode is adopted, a middle heating medium circulating pipeline is omitted, and the system efficiency is improved; and the condensate water is discharged in an open mode, the safety of the system can be guaranteed essentially, leaked gas cannot be brought back to a safety area, and therefore the reliability of the ship is improved.

The system comprises an electrolysis module, a water supply part and a hydrocarbon fuel supply part, and is characterized in that the electrolysis module comprises a cathode inlet, an anode inlet, a cathode outlet and an anode outlet; the water supply part is sequentially connected with a first water pump, a first steam generator, a first heat exchanger, a first heater and a cathode inlet; the cathode outlet is connected with the cathode inlet through the first ejector in sequence, the cathode outlet is connected with the first heat exchanger, the first condenser and the hydrogen storage part in sequence, and the hydrogen storage part is connected with the first heat exchanger through the first mass flow meter; and the hydrocarbon fuel supply part is sequentially connected with a second mass flow meter, a second heat exchanger, a second heater and an anode inlet. According to the invention, the strong endothermic reaction of hydrocarbon fuel oxidation is utilized to compensate the strong endothermic electrolyzed water reaction of the cathode in situ, so that the electric energy consumption of the electrolysis module is greatly reduced, meanwhile, the operating temperature of the electrolysis module is reduced, and the service life is greatly prolonged.

The application provides an aero-engine acceleration limiting method, and relates to the technical field of aero-engines, and comprises the following steps: receiving a flight control instruction, calculating a first fuel supply amount according to the flight control instruction, and executing single / dual-outer-envelop working mode conversion; detecting a position state of an actual mode selection valve and a rotating speed feedback value in real time; judging whether the current state of the engine meets the mode switching condition of single / dual-outer-envelop according to the position state of the mode selection valve; calculating a second fuel supply amount, a third fuel supply amount, and a fourth fuel supply amount according to the position state of the mode selection valve, combining the first fuel supply amount, a fifth fuel supply amount, taking the minimum value among the five fuel supply amounts, comparing the minimum value with a sixth fuel supply amount to take the maximum value, taking the minimum value with a seventh fuel supply amount, taking the maximum value of the comparison result with an eighth fuel supply amount as a control fuel supply amount output; and judging whether the engine is in an acceleration / deceleration state according to a rotating speed difference. The application solves the safety problem possibly caused by the acceleration / deceleration process of the dual-outer-envelop engine.

A fuel pressure controller includes processing circuitry that executes a first process, a second process, and a third process as a fuel pressure reduction control. The first process includes closing both a first electromagnetic valve and a second electromagnetic valve. The second process includes adjusting the pressure of the fuel supplied to a fuel injection valve by repeatedly performing an opening and closing operation of the second electromagnetic valve. The third process includes, when the fuel pressure in a fuel pipe between the first electromagnetic valve and the second electromagnetic valve reaches a prescribed pressure, stopping the opening and closing operation of the second electromagnetic valve to maintain the second electromagnetic valve in an open state, and repeatedly performing the opening and closing operation of the first electromagnetic valve to adjust the pressure of the fuel supplied to the fuel injection valve.

The invention relates to the technical field of energy conservation and environmental protection, in particular to an industrial boiler combustion oscillation modal suppression system and a method thereof, and constructs a system which is highly intelligent, high in adaptability and remarkable in suppression effect by fusing innovative technologies such as multi-dimensional perception, intelligent identification, active suppression and adaptive optimization. The data acquisition module accurately captures hearth temperature, flame video and sound pressure signals; the signal processing module deeply analyzes and extracts oscillation modes of a temperature field and a flame area, and analyzes a sound pressure signal frequency spectrum through short-time Fourier transform; the mode identification module accurately identifies the combustion oscillation mode and determines the characteristic frequency and amplitude of the combustion oscillation mode; the suppression control module generates an infrasonic wave intervention signal to form an anti-phase sound field so as to effectively suppress oscillation; the fuel adjusting module adjusts the opening time sequence of the gas nozzle according to the instruction, and fuel supply is optimized. According to the system, the operation stability and heat efficiency of the boiler are remarkably improved, NOx emission is greatly reduced, and powerful technical support is provided for clean and efficient operation of the industrial boiler.

The invention provides a control method and system for fuel supply of a volatilization kiln, and belongs to the technical field of industrial control. Firstly, real-time working condition data and historical working condition data of the volatilization kiln are obtained, working condition trend prediction processing is carried out based on the real-time working condition data and the historical working condition data of the volatilization kiln, and a working condition trend prediction result is obtained; the method comprises the following steps: constructing a fuel supply plan library according to a working condition trend prediction result, monitoring the deviation between the current working condition and the prediction result in real time, matching and dynamically adapting a target supply adjustment strategy from the fuel supply plan library to obtain an execution scheme, sending the execution scheme to a fuel supply system for execution, and collecting feedback data to update the plan library. Therefore, fuel supply of the volatilization kiln can be intelligently and accurately controlled, production efficiency and product quality are improved, and cost is reduced.

The invention relates to the technical field of hydrogen internal combustion engines, in particular to a water-hydrogen combined supply internal combustion engine which comprises a first power generation unit driven by hydrogen and air combusted by a hydrogen internal combustion engine unit. The gas recovery unit converts water vapor in exhausted gas into liquid water through a condensation driving module and drives the second power generation unit at the same time; the fuel supply unit adjusts the hydrogen injection amount through a generated adjusting instruction based on multi-dimensional data detected by the monitoring unit and processed by the data processing unit and the confidence decision-making unit, and then generation of nitric oxide is inhibited. Condensate water recovery and combustion control of the hydrogen internal combustion engine are deeply combined, the actual exhaust humidity is reversely deduced by monitoring the flow of the condensate water, the gas detection error tolerance range is dynamically corrected, the hydrogen-oxygen combustion ratio judgment result is linked, safety amplitude limiting control over hydrogen fuel supply is achieved, and nitrogen oxide generation of the hydrogen internal combustion engine is reduced.

The present application provides a dynamics analysis method for an ammonia combustion refrigeration system in large park cooling. The method comprises: on the basis of a geometric structure of an ammonia combustion chamber and a fuel supply amount, calculating the heat generated by ammonia combustion and analyzing the heat transfer mode between the combustion chamber and a desorption tower, the heat transfer mode comprising direct contact type heat transfer and partition type heat transfer, and simulating the heat transfer process to obtain and draw the heat flux distribution of the tower wall surface; on the basis of the flow state and a relationship curve between the pressure drop and the flow velocity, analyzing the desorption process of a refrigerant in a solution, and on the basis of the concentration of the solution, a boiling point of the refrigerant, and the vapor pressure, calculating local desorption rates at different positions in the desorption tower and the refrigerant vapor generation amount; and on the basis of the heat flux distribution, calculating the temperature distribution of the solution, and analyzing the heat transfer and mass transfer processes in the desorption tower to obtain a local heat transfer coefficient and the mass transfer efficiency distribution of the surface of a filler.

The invention relates to the technical field of ship engine tail gas treatment, and discloses a denitration system and a denitration method for ammonia fuel engine tail gas. The denitration system comprises an ammonia fuel engine and a denitration device, the liquid ammonia fuel supply device is connected with the ammonia fuel engine through a supply pipeline and is used for supplying ammonia fuel to the ammonia fuel engine; a gas inlet of the ammonia gas buffer tank is connected with the supply pipeline, and the ammonia gas buffer tank is used for collecting unburned ammonia gas generated in the supply pipeline; the ammonia water preparation device is connected with a gas outlet of the ammonia gas buffer tank; and the tail gas denitration device is connected with an outlet of the ammonia water preparation device and an exhaust port of the ammonia fuel engine. The ammonia water is prepared from the unburned ammonia gas, and the prepared ammonia water is used for subsequent reduction of nitrogen oxides in tail gas of an ammonia fuel engine, so that the treatment problem of the unburned ammonia gas can be solved, and meanwhile, the consumption of a reducing agent is reduced. In addition, the ammonia water can replace part of the reducing agent, so that the storage amount of the reducing agent can be reduced, and the ship space occupied by the reducing agent is reduced.

The present application discloses an aircraft configured for vertical take-off and landing and horizontal flight. The aircraft includes (i) a first nacelle fuel tank configured to hold a first fuel supply for a first engine and to selectively provide fuel to the first engine during both (a) a vertical take-off and landing, and (b) horizontal flight; (ii) a fuselage fuel tank, and (iii) a control system configured to redistribute fuel between the first nacelle fuel tank and the fuselage fuel tank.

An aircraft fuel system includes a fuel tank, a fuel pump configured to receive a fuel flow from the fuel tank via a fuel supply line. The fuel system further includes a tap fluidly coupled to an outlet of the fuel pump, at least one generator or permanent magnet machine fluidly connected to the fuel pump via the tap, and the tap is configured to deliver fuel to the at least one generator or permanent magnet machine. The fuel system further includes a gearbox mechanically connected to the at least one generator or permanent magnet machine.

The invention provides a press machine self-adaptive anti-unbalance-loading shock suppression device which comprises a hydraulic cylinder and a cylinder body, a space for containing damping liquid is formed in the cylinder body, and a plurality of damping holes are formed in the cylinder body; a piston is fixed at one end of the buffer damping rod, and the damping rod is embedded into the cylinder body and can slide relative to the cylinder body; the buffer sleeve is fixed to the other end of the damping rod and arranged on the hydraulic cylinder in a sleeving mode, and the sleeve can move along with the damping rod to shield or expose the damping holes one by one. Comprising an upper die, a lower die, a guide column, a lower die base, an image shooting piece, an image recognition piece, a hydraulic oil supply system, a lifting cylinder set, an industrial personal computer and the progressive buffering energy absorption device. When pressure is large, the sleeve can descend along with the damping rod to shield the damping holes one by one, the outflow resistance of damping liquid is increased, the effect of increasing damping and buffering force is achieved, collision energy generated in the working process of the punching machine can be absorbed in the buffering mode, the upper limit of the buffering mode is high, and production efficiency can be guaranteed.

The invention discloses a water-doped methanol fuel static mixer and a blending flow control module thereof, the static mixer realizes efficient mixing of methanol and water through a flow guide structure specially designed in the static mixer, and temperature, pressure and flow sensors are combined to monitor and adjust the concentration and supply quantity of fuel in real time. The mixer comprises a feed port, a discharge port, an internal multi-stage mixing structure, a flow control device and a monitoring instrument, through optimized geometric design and the multi-stage mixing structure, the stability of fuel concentration and the reliability of supply are ensured, the module can effectively solve the problems that methanol and water are not mixed uniformly, the concentration fluctuates, and the supply amount is not stable, and the mixing efficiency is improved. And stable supply of fuel is ensured, and the efficiency and safety of the fuel engine are improved. The system is suitable for the actual demand of ship fuel supply and has high automation and reliability.

The invention discloses an electricity and heat coordination method and system of a solid oxide fuel cell heat and power cogeneration system. The method comprises the following steps: acquiring a system operation parameter set (an electric load, a heat load, an electric pile temperature, a tail gas temperature and a fuel flow) in real time; determining a thermoelectric coordination control target value including a target power generation efficiency interval and a target heat supply temperature interval based on the parameter set; a fuel supply and air flow adjusting instruction is generated; executing the instruction to dynamically match the output power of the system with the electric load demand, dynamically match the output temperature of the waste heat recovery system with the thermal load demand, and generate a real-time heat-to-power ratio; when the stack temperature exceeds a preset safety threshold value, the fuel flow is preferentially reduced to a temperature return safety interval, and the air flow is synchronously compensated according to a stoichiometric ratio; and dynamically correcting the boundary value of the target power generation efficiency interval based on the real-time heat-to-electricity ratio, so that the real-time heat-to-electricity ratio of the system is always in the preset optimal efficiency interval. According to the invention, dynamic decoupling control and continuous efficiency optimization of the electric heating load are realized.

A combustor nozzle including nozzle modules, a combustor, and a gas turbine including the same are proposed. The nozzle module includes a fuel supply pipe having an internal fuel flow path, manifolds communicating with the fuel supply pipe and arranged in a row in a radial direction so that air inlet flow paths are respectively formed at positions therebetween, and fuel mixers disposed along a circumferential direction at the rear side of the manifold to receive the fuel from the manifold and inject the fuel, each of the plurality of fuel mixers including a mixer body having one end communicating with the manifold, wherein a tip is formed at the other end of the mixer body, a shroud disposed to surround an outer circumferential surface of the mixer body to guide an airflow, and at least one fuel port formed through the mixer body to inject fuel.

A mesh filter for a fuel system of a vehicle may include: a frame for maintaining a shape thereof; a mesh member coupled to the frame so as to remove foreign substances contained in fuel, where the mesh member includes a first mesh member and a second mesh member; and an opening unit for opening and closing a fuel path in the first mesh member. In particular, the second mesh member has a mesh size smaller than a mesh size of the first mesh member such that the mesh filter inhibits clogging of the mesh filter with paraffin wax.

Implementations of the disclosed subject matter may provide an adaptive thrust structure for a space launch vehicle that may include an interface block that is fluidically coupled to a fuel supply, a fuel manifold, an oxidizer supply, and an oxidizer manifold. A first adapter plate may be coupled to a first engine assembly. First adapter lines may be fluidically coupled to the first engine assembly and the interface block, via the first adapter plate. A second engine assembly, second adapter lines, and a second adapter plate are capable of replacing the first engine assembly, first adapter lines, and first adapter plate. Implementations of the disclosed subject matter may provide a reusable and reconfigurable launch vehicle that may include a reusable second stage, and a reusable and reconfigurable transporter having a plurality of zones that are configurable to transport cargo, one or more passengers, and / or one or more satellites.

To continuously supply a sufficient amount of a second gas (hydrogen gas) to a fuel battery unit.SOLUTION: When predefined vessel change conditions are satisfied, a control unit 19 makes water W stored in a temperature-adjusted liquid tank 10 that accommodates a canister C which supplies hydrogen gas G among temperature-adjusted liquid tanks 10 flow to a temperature-adjusted liquid tank 10 in which the amount of stored water W is below a predefined first liquid storage amount, and makes the water W stored in the temperature-adjusted liquid tank 10 that accommodates a canister C to which hydrogen gas G is fed among the temperature-adjusted liquid tanks 10 flow to the temperature-adjusted liquid tank 10 that accommodates the canister C which supplies the hydrogen gas G. After that, the control unit supplies water W heated by a condenser 22 and water W cooled by an evaporator 25 to defined temperature adjustment liquid tanks 10.SELECTED DRAWING: Figure 1

The invention relates to the technical field of fuel flow regulation, and particularly discloses a fuel flow automatic regulation control method which comprises the following steps: establishing a model of a fuel supply system; pressure adjustment of oil supply is converted into frequency adjustment of a frequency converter and opening adjustment of a servo valve C on an oil return way; flow regulation of main oil and auxiliary oil is converted into opening regulation of a servo valve A on a main oil way and a servo valve B on an auxiliary oil way; after the opening degree of the servo valve A on the main oil way and the opening degree of the servo valve B on the auxiliary oil way are adjusted in place, the energy consumption of a certain combustion chamber in the fuel flow adjusting and changing process can be reduced, the operation efficiency is improved, the operation time is saved, and the operation risk is reduced.